Change-speed gear



July 29 1924. 1,502,701

'GRAF ALFREDJVCN SODEN-FRAUNHOFEN chutes SPEED GEAR Filed Uan. 25, 1922 2 ShutkShoet 1 Jul 29, 1924. v I 1,502,701

GRAF ALFRED VON SODEN-FRAUNHOFEN CHANGE SPEED GEAR Filed Jan. 25 1922 2 Mutt-Shoot. 2

Fig.5.

H96. 47 4,: I V Z 0 a,

, f g L Patented July 29, 1924.

unrrsn STATES PA'rE-N'r OFFICE.

GRAI' ALFRED VON SODEN-FRAUNH OFEN, OF FRIEDRICHSHAFEN, GERMANY, AS-

T Z AHNRADFAJQBIK GESEIQLSCHAFT, OF

SIGNOR, BY .MESNE ASSIGNMENTS, FRJEDRICHSEAFEN, GERMANY.

CHANGE-SPEED cm Application filed January 25, 1922. Serial No. 531,810.

To all whom it may concern:

Be it known that I, Gm ALFRED VON SoDEN-FnAU'NHornN, a citizen of Germany, residing at Friedrichshafen a. B., Germany,

'5 have invented certain new and useful Tm:

provements in Change-Speed Gears, of I which the following is a specification.

My invention relates to change speed gear for motor cars and particularly to such gear in which the locking of the striker rods which are inoperative for the time being is efiected by a rotary locking member common to all striker rods, this locking member substantially consisting of a cylinder having perforations arranged in staggered relation and adapted to cooperate with locking pins fixed to the striker rods. Owing to this arran ment of perforations, only a single stri er rod is free to move at a time, while all other striker rods are locked against movement by their locking pins abutting against solid portions of the locking cylinder. The striker rod which shall be thrown in in each individual case is caused to ad- 2B- vance towards the cylinder by means of a spring provided for this purpose, its locking: pln entering the erforation of the cylinder in front of it. e lockin cylinder can be set either by hand or pre erably by means of a suitable setting device, well known per se, and which comprises a sprin or springs adapted to be placed under different tensions, according to which the locking cylinder is rotated through a' larger orsmaller angle, thus plaoin one or the other perforation front of te locking pin appertainin to it.

Tit is an object of my invention to so arrange lockand unlock the striker rods as to I an obtain; a gear of very compact design. To

this end the striker rods are partly moved in opposite directions when moving the slidin wheels into identical positions. The slfiing wheels are for instance arranged in as pairs symmetrically with regard to a common central clutch member foreach pair and must therefore be moved in, opposite directions in order to engage and disengage them with the clutch. This opposite movement of the striker rods is rendered ossiblc by the striker rods engaging the ocking member from opposite" sides. The simultaneous unlocking of all striker rods can be effected by aid of a yoke which is so de-. signed that it unlocks in opposite direction those striker rods which are operated in opposite direction.

A further means for effecting the operation of the striker rods in opposite directions is provided by reversin t e motion of part of .the striker rods whic are arranged all on side of the locking member by means of double armed levers, which are operated by the principal striker rods and in turn operate auxiliary striker rods which, however, do not engage the locking member but merely serve to operate the sliding wheels. The simultaneous unlockingof allthe rods is effected in the usual manner, for instance, by a bar extending transversely to the striker rods. However, the auxiliary striker rods are not provided with catches for the unlocking bar so that the corresponding slid-' ing wheels are moved only by aid of the double armed levers and therefore in opposite direction. The auxiliary striker rods may, however, also be dispensed with and the sliding wheels may be operated directly by the" double armed levers.

I prefer employing a hollow locking cylinder provided with perforations disposed in staggered relation.

In the drawings aiiixed to this specific-ation and forming part thereof two modificaj tions of a device embodying my invention are illustrated dia rammatically by way of example. In the rawings- Fig. 1 is a section on line A-A in Fig. 2,

Fig. 2 is a plan view, and

Fig. 3 a section on line B-C in Fig. 2, a locking cylinder being arranged to be engaged by three striker rods on one side and by two striker rods on the other,

Fig. 4 is a section of the second modification, taken on line D-D in Fig. 6,

Fig. 5 is a section on line E-Ein Fig. 6, and v Fi 6 is a plan view, with the locking 0 lin er in longitudinal section, of a gear, a l the striker rods being .here arranged on the same side of a locking cylinder.

Referring first to Figs..1 to '3, the striker Fig. 1 move from the left to the right, while the arms 4 and 5 for the striker rods 4 and 5 move from the right to the left. All the striker rods are .acted u on by springs 7 which move them into t eir locking positions. The unlocking is effected by means of a strap 8 sn ported by two trunnions 9 and adapte to be turned about them with the aid of a lever arm 9 mounted on one of the trunnions 9 and which is either operated by hand or is connected with the general controllin mechanism of the car, thus causing the ockmg pins to be automatically withdrawn from the perforation 1n the lockin cylinder, whenever or'before a change 0 speed is effected.

The stra engages the striker rods 1,. 2 and 3 by its od the-striker rods 4 and by pins 10, 10. hen the strap is turned about 1ts trunnions 9, the striker rods 1, 2, 3 aremoved to thel'eft and are unlocked, while the striker rods 4 and 5 are moved to the eferring now to Figs. 4 to 6, all the;

' striker rods are here arranged on the same side of the locking cylinder. The reversal.

of the motion of part of the striker rods is effected in this case by double armed levers.

Thus the striker rod 12 is connected with an auxiliary striker rod 14 by a double armed lever 15 which isfulcrumed to the frame of the gear. Striker rod 12 does not move sliding wheel 13 directly when it enages the corresponding recess in the lockmg cylinder 6, but merely releases the auxiliary rod 14 connected with the wheel 13 by. an arm 14" whereupon the spring 16 on the striker rod 14 movesthe sliding wheel 13 and at-the same time causes the striker rod 12 to engage its recess in the cylinder 6, the rod 12 being thus forced into the respective recess of cylinder 6 by the action of thespring 16 and the lever 15. On the other hand striker rod 11 is acted upon directlyby a spring 17 and actuates the respective wheel directly by aid of an arm 18. The rods are unlocked by a bar 19 extending transversely to the striker rods and which can be turned about trunnions 20. The rods 11 and 12 carry lugs 11, 12, respectively, adapted to be engaged by the bar 19, while the auxiliary rod 14 v has no lug. On the bar 19 being operated,

the rods 11 and 12 are withdrawn from the recesses in the locking cylinder 6, the movem'ent of rod 12 being transmitted to the motion of site to that 0 'a plurality of sliding auxiliary rod 14, by the double armed lever I wish 'it to be understood that I do not 3 desire'to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

I'claim: I

1. In a change speed ear in combination, a plurality of sliding w eels, striker rods in operative connection with said wheels, means for moving said rods into and out of operative position and a common lockingmember for all said rods, the lockin rt of said rods -being efiecte inda direction opposite to that of the other re s.

2. In a change speed gear in combination, a plurality of sliding wheels, striker rods in operative connection with said wheels, means for moving said rods into and out of'o erative position and a common rotary locking member for all said rods, the looking motion of part of said rods being effected in a direction opposite to that of the other rods.

3. In a changespeed gear in combination, a plurality of sliding wheels, striker rods in operative connection with" said wheels, means for movingsaid rods into andout of operative position and a common locking member for all said rods, part of said rods being disposed on one, another part on the opposite side of said lockin member and the locking motion of said rst mentioned rods being eflected in a direction opposite to that of theother rods.

4. In a change speed gear in combination, a plurality of slidin ,wheels, striker rods in operative connection with said wheels, means for moving said rods into operative position, a common locking member for all said rods, the locking motion of parts of said rods bein efiected in a direction oppocommon to all said rods, adapted to simultaneously unlock all said rods. I

5. In a change speed gear in combination, wheels, striker rods in operative connection with said wheels,

the other rods and means,-

means for moving said rods into operative pos1t1on(i a common locking member for-all said ro s, the locking motion of parts of said rods bein effected in a direction op armed lever adapted to simultaneously unlock all said rod 6. In a change s' eed gear in combination, a plurality of sli ing wheels, striker rods in operative connectlon with said wheels, means for moving said rods into and out of operative position, a locking pin on' each site'to' that o the other rods and a double I 1 side of said cylinder and a strap capable of rod, a locking cylinder having perforations directions so as to disengage'said pins from disposed in staggered relation and in line said cylinder. 10 tvith said locking pins, part of said rods he- In testimony whereof afiix my signature. ing disposed on one side, part on the other 6MP ALFRED Von SODENFRAUNHOFEM rocking about a horizontal axis and adapted Witnesses: to cooperate with the rods on either side of HENRI BRUNSWEIGHE,

said cylinder in displacing them in opposite E. W. MATENBERG. 

